This DC-UPS contains a 1.2 amp-hour sealed lead
acid battery. It is charged from the vehicle's electrical system and switches
your load to its internal battery when the engine is turned off, or at any
other time that the electrical bus drops below 23.6 volts. Keep computers and
video systems alive during engine starting or other interruptions in
power.

Less than 50
microseconds from main battery to auxiliary batteryless than 50
microseconds from auxiliary battery to main battery. We have a capacitor to
keep the voltage up during the transition and have not had any problem with
customer's equipment dropping out during the switchover.

Backup time

12A for 50
seconds9A for 100 seconds6A for 200 seconds2A for 1000
seconds1A for 44 minutes60mA for 20 hours

Charge voltage

Factory selectable,
default is 23.6VThis is the input voltage at which the internal charger
starts boosting the voltage to charge the auxiliary battery

Internal battery

1.2 AH 24V Sealed
lead acid battery

Charge algorithm

Constant current
until the battery voltage reaches 26.8 volts, taper charge above 26.8 volts to
zero current at 28.2 volts

Minimum ambient
temperature -10°C (-40°C available upon request)Maximum ambient
temperature of 70°CWhen the case temperature gets above 45°C the
charge current is automatically reduced to maintain system operation at higher
temperatures.

Storage Temperature

-20°C to
70°C

Connection

Screw terminals,
included are spade terminal adapters as shown below

Included spade (faston) connector
adapters

LEDs

LEDs light up
showing whether the load is being powered by the car or the auxiliary
battery

The PST-Backup UPS devices are designed
to keep your equipment from losing power or rebooting during engine
startup, ensuring these spikes and sags in power don't shorten the life of
your mission critical electronics. We do this by providing uninterrupted,
clean, consistent power to your equipment, extending the life of your
electronics.

The backup prevents your equipment from running the
vehicle's battery down avoiding jump-starts. It switches over to the
auxiliary battery when the engine is shut off and the alternator stops or the
car's battery drops below 11.8 volts. This means you never have to worry about
that after-market equipment leaving you with a dead battery in the morning.

The PST-Backup isolates its battery from the vehicle, so it
can't be discharged by the vehicle's other electronics, and it won't try to
participate in the engine startup process.

The PST-Backup DC-UPS powers
your equipment in the vehicle using the car electrical system, but switches
to external battery power when the car's battery is removed, stolen, or drops
below a predetermined voltage, acting as a battery backup (BBU) and power
conditioner.

Allows for safely charging our internal battery from
the car's electrical bus by isolating and current regulating the connection
to the auxiliary battery. This uninterruptible power supply is designed to
withstand the harsh electrical and temperature requirements of automotive
equipment including spike, dropouts, load dumps, jump-starting, high and low
temperatures.